Press-Republican

Columns

September 2, 2012

Making quality feed

I often field questions about common farming practices that are a mystery to those who don’t live or work on a farm. With larger farms, larger equipment and farm machinery is required to efficiently till, plant, fertilize and harvest the increasingly larger quantities of feed required.

On top of that, some of the newer methods of crop harvesting are much different from the old days. Large white tubes lining the roadside, huge mounds of black plastic covered with old tires and huge rectangular bales of hay on tractor trailers are common sights on today’s modern farms.

For the local dairy farmers who depend on the quality of their crops to make milk, hay harvesting nowadays is usually done by making haylage. Haylage is hay that is mowed and harvested while still at a high enough moisture content to support fermentation. It can be chopped and ensiled in silos, bunks or ag bags; or it can be baled as large round bales that are wrapped in plastic or stuffed into giant tubes.

The purpose of the silos or plastic tubing is to exclude oxygen from the forage to allow for fermentation. Lactobacillus bacteria convert the carbohydrates in the plants into lactic acid. They continue to produce lactic acid and lower the pH of the forage until they can no longer function. At this point, the hay is essentially pickled and can be stored for quite some time without loss of quality.

The silage-making process has several benefits. One of the major advantages is that the hay crop can be harvested when it is ready during almost any weather conditions. In order to harvest high-quality forage, it must be cut early in the spring to maximize the protein, digestibility and palatability of the feed. Without having to wait for three or four days of hot, sunny weather, farmers can cut and harvest their hay crop in 24 to 36 hours or less.

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